How do you evaluate csc 180 ? Trigonometry Right Triangles Trigonometric Functions of Any Angle 1 Answer KillerBunny May 15, 2018 Unidefined. Explanation: Since csc(x)=1/sin(x), you have csc(180)=1/sin(180) But since sin(180)=0, you can't divide by it, and thus csc(180) is not defined. Answer link Related questions How do you find the trigonometric functions of any angle? What is the reference angle? How do you use the ordered pairs on a unit circle to evaluate a trigonometric function of any angle? What is the reference angle for 140^\circ? How do you find the value of cot 300^@? What is the value of sin -45^@? How do you find the trigonometric functions of values that are greater than 360^@? How do you use the reference angles to find sin210cos330-tan 135? How do you know if sin 30 = sin 150? How do you show that (costheta)(sectheta) = 1 if theta=pi/4? See all questions in Trigonometric Functions of Any Angle Impact of this question 6098 views around the world You can reuse this answer Creative Commons License